What are signs that a boyfriend has slept with best friend?

There are always signs that a man is cheating in general, for example, he loses interest in you sexually or becomes oddly interested in "new" sexual behaviors, they may have lost interest in arguing because they have checked out of the relationship emotionally. It is a fact that men cheat 80% of the time because they would rather sweep problems under the rug than deal with them, so pay special attention if your man-1spends more time at work2.spends more time with family(out of the ordinary)3.always busy with some project. these are classic excuses to get away from you. . now if you suspect your boyfriend has cheated with a friend you must ask yourself why? Are they spending an unusual amount of time together without you, are things awkward when all of you are in the same room together? is he constantly complimenting her or "bringing her up" in conversation, or comparing you to her?These all may be signs that there is more going on than whats being admitted. The best thing to do is to confront him and be very clear on why you are feeling this way. Note his reaction if he is overreacting or acting extremely insulted by the notion, he may very well be hiding something. This is one that I have used and its worked-Its easy to catch a cheater with his cell phone: So when hes tucked away start a text conversation with your friend using his cell phone-go as far as you like and talk about as much as possible until its impossible for either one to refute whats been going on i am sorry if all this turns out to be true-i have been there and its no easy deal